/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-770125f [2021-05-21 21:11:18,445 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-05-21 21:11:18,447 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-05-21 21:11:18,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-05-21 21:11:18,504 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-05-21 21:11:18,509 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-05-21 21:11:18,510 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-05-21 21:11:18,511 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-05-21 21:11:18,514 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-05-21 21:11:18,514 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-05-21 21:11:18,516 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-05-21 21:11:18,521 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-05-21 21:11:18,522 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-05-21 21:11:18,523 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-05-21 21:11:18,525 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-05-21 21:11:18,526 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-05-21 21:11:18,532 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-05-21 21:11:18,539 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-05-21 21:11:18,540 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-05-21 21:11:18,540 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-05-21 21:11:18,544 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-05-21 21:11:18,579 INFO L113 SettingsManager]: Loading preferences was successful [2021-05-21 21:11:18,579 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-05-21 21:11:18,580 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-05-21 21:11:18,580 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-05-21 21:11:18,582 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-05-21 21:11:18,582 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-05-21 21:11:18,582 INFO L138 SettingsManager]: * Use SBE=true [2021-05-21 21:11:18,583 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-05-21 21:11:18,583 INFO L138 SettingsManager]: * sizeof long=4 [2021-05-21 21:11:18,583 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-05-21 21:11:18,584 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-05-21 21:11:18,584 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-05-21 21:11:18,584 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-05-21 21:11:18,584 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-05-21 21:11:18,584 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-05-21 21:11:18,584 INFO L138 SettingsManager]: * sizeof long double=12 [2021-05-21 21:11:18,584 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-05-21 21:11:18,584 INFO L138 SettingsManager]: * Use constant arrays=true [2021-05-21 21:11:18,585 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-05-21 21:11:18,585 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-05-21 21:11:18,585 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-05-21 21:11:18,585 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-05-21 21:11:18,585 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-05-21 21:11:18,585 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:11:18,585 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-05-21 21:11:18,585 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-05-21 21:11:18,586 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-05-21 21:11:18,586 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-05-21 21:11:18,586 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-05-21 21:11:18,586 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-05-21 21:11:18,586 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-05-21 21:11:18,586 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-05-21 21:11:18,878 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-05-21 21:11:18,899 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-05-21 21:11:18,900 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-05-21 21:11:18,901 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-05-21 21:11:18,904 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-05-21 21:11:18,905 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl [2021-05-21 21:11:18,905 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20/prod-cons.wvr.bpl' [2021-05-21 21:11:18,942 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-05-21 21:11:18,943 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-05-21 21:11:18,957 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-05-21 21:11:18,957 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-05-21 21:11:18,957 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-05-21 21:11:18,967 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... [2021-05-21 21:11:18,975 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... [2021-05-21 21:11:18,981 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-05-21 21:11:18,982 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-05-21 21:11:18,983 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-05-21 21:11:18,983 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-05-21 21:11:18,990 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... [2021-05-21 21:11:18,990 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... [2021-05-21 21:11:18,991 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... [2021-05-21 21:11:18,991 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... [2021-05-21 21:11:18,994 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... [2021-05-21 21:11:18,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... [2021-05-21 21:11:18,997 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... [2021-05-21 21:11:18,998 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-05-21 21:11:18,998 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-05-21 21:11:18,998 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-05-21 21:11:18,999 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-05-21 21:11:19,002 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-05-21 21:11:19,067 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-05-21 21:11:19,067 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-05-21 21:11:19,067 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-05-21 21:11:19,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-05-21 21:11:19,068 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-05-21 21:11:19,068 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-05-21 21:11:19,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-05-21 21:11:19,068 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-05-21 21:11:19,068 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-05-21 21:11:19,068 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-05-21 21:11:19,069 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-05-21 21:11:19,069 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-05-21 21:11:19,069 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-05-21 21:11:19,308 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-05-21 21:11:19,308 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-05-21 21:11:19,310 INFO L202 PluginConnector]: Adding new model prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:11:19 BoogieIcfgContainer [2021-05-21 21:11:19,310 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-05-21 21:11:19,311 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-05-21 21:11:19,311 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-05-21 21:11:19,314 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-05-21 21:11:19,314 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.05 09:11:18" (1/2) ... [2021-05-21 21:11:19,315 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@402e5fa9 and model type prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.05 09:11:19, skipping insertion in model container [2021-05-21 21:11:19,315 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "prod-cons.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.05 09:11:19" (2/2) ... [2021-05-21 21:11:19,316 INFO L111 eAbstractionObserver]: Analyzing ICFG prod-cons.wvr.bpl [2021-05-21 21:11:19,336 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-05-21 21:11:19,337 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-05-21 21:11:19,337 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-05-21 21:11:19,338 INFO L478 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-05-21 21:11:19,399 INFO L149 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-05-21 21:11:19,434 INFO L255 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-05-21 21:11:19,491 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-05-21 21:11:19,491 INFO L379 AbstractCegarLoop]: Hoare is false [2021-05-21 21:11:19,491 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-05-21 21:11:19,491 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-05-21 21:11:19,491 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-05-21 21:11:19,491 INFO L383 AbstractCegarLoop]: Difference is false [2021-05-21 21:11:19,491 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-05-21 21:11:19,491 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-05-21 21:11:19,499 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 30 transitions, 84 flow [2021-05-21 21:11:19,521 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,524 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:11:19,531 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:19,531 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:19,532 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:19,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:19,542 INFO L82 PathProgramCache]: Analyzing trace with hash -718559117, now seen corresponding path program 1 times [2021-05-21 21:11:19,549 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:19,549 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1065458218] [2021-05-21 21:11:19,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:19,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:19,684 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:19,685 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:19,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1065458218] [2021-05-21 21:11:19,686 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1065458218] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:11:19,686 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:11:19,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:11:19,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014987676] [2021-05-21 21:11:19,691 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:11:19,692 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:19,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:11:19,707 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:11:19,710 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 2.5833333333333335) internal successors, (341), 133 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:19,771 INFO L93 Difference]: Finished difference Result 172 states and 413 transitions. [2021-05-21 21:11:19,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:11:19,773 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:11:19,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:19,782 INFO L225 Difference]: With dead ends: 172 [2021-05-21 21:11:19,783 INFO L226 Difference]: Without dead ends: 109 [2021-05-21 21:11:19,784 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:11:19,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-05-21 21:11:19,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-05-21 21:11:19,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 2.3055555555555554) internal successors, (249), 108 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 249 transitions. [2021-05-21 21:11:19,818 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 249 transitions. Word has length 19 [2021-05-21 21:11:19,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:19,818 INFO L482 AbstractCegarLoop]: Abstraction has 109 states and 249 transitions. [2021-05-21 21:11:19,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,819 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 249 transitions. [2021-05-21 21:11:19,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-05-21 21:11:19,820 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:19,820 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:19,820 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-05-21 21:11:19,821 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:19,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:19,821 INFO L82 PathProgramCache]: Analyzing trace with hash -123901407, now seen corresponding path program 2 times [2021-05-21 21:11:19,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:19,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433913909] [2021-05-21 21:11:19,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:19,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:19,862 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:19,862 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:19,862 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433913909] [2021-05-21 21:11:19,862 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433913909] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:11:19,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:11:19,863 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-05-21 21:11:19,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665364402] [2021-05-21 21:11:19,864 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:11:19,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:19,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:11:19,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:11:19,865 INFO L87 Difference]: Start difference. First operand 109 states and 249 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:19,915 INFO L93 Difference]: Finished difference Result 190 states and 436 transitions. [2021-05-21 21:11:19,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-05-21 21:11:19,916 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-05-21 21:11:19,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:19,918 INFO L225 Difference]: With dead ends: 190 [2021-05-21 21:11:19,918 INFO L226 Difference]: Without dead ends: 142 [2021-05-21 21:11:19,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 30.2ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-05-21 21:11:19,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-05-21 21:11:19,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 142. [2021-05-21 21:11:19,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 2.3404255319148937) internal successors, (330), 141 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 330 transitions. [2021-05-21 21:11:19,933 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 330 transitions. Word has length 19 [2021-05-21 21:11:19,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:19,933 INFO L482 AbstractCegarLoop]: Abstraction has 142 states and 330 transitions. [2021-05-21 21:11:19,933 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 4 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,933 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 330 transitions. [2021-05-21 21:11:19,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-05-21 21:11:19,935 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:19,935 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:19,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-05-21 21:11:19,935 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:19,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:19,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1960072514, now seen corresponding path program 1 times [2021-05-21 21:11:19,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:19,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [223764801] [2021-05-21 21:11:19,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:19,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:19,964 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:19,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:19,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [223764801] [2021-05-21 21:11:19,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [223764801] provided 1 perfect and 0 imperfect interpolant sequences [2021-05-21 21:11:19,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-05-21 21:11:19,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-05-21 21:11:19,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990190493] [2021-05-21 21:11:19,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-05-21 21:11:19,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:19,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-05-21 21:11:19,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:11:19,967 INFO L87 Difference]: Start difference. First operand 142 states and 330 transitions. Second operand has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:19,973 INFO L93 Difference]: Finished difference Result 164 states and 373 transitions. [2021-05-21 21:11:19,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-05-21 21:11:19,974 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-05-21 21:11:19,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:19,975 INFO L225 Difference]: With dead ends: 164 [2021-05-21 21:11:19,975 INFO L226 Difference]: Without dead ends: 152 [2021-05-21 21:11:19,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-05-21 21:11:19,977 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-05-21 21:11:19,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2021-05-21 21:11:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 2.3178807947019866) internal successors, (350), 151 states have internal predecessors, (350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 350 transitions. [2021-05-21 21:11:19,989 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 350 transitions. Word has length 22 [2021-05-21 21:11:19,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:19,989 INFO L482 AbstractCegarLoop]: Abstraction has 152 states and 350 transitions. [2021-05-21 21:11:19,989 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 7.333333333333333) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:19,989 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 350 transitions. [2021-05-21 21:11:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-05-21 21:11:19,991 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:19,991 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:19,991 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-05-21 21:11:19,992 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:19,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:19,992 INFO L82 PathProgramCache]: Analyzing trace with hash -480736564, now seen corresponding path program 1 times [2021-05-21 21:11:19,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:19,993 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762223103] [2021-05-21 21:11:19,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:20,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:20,117 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:20,118 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:20,118 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762223103] [2021-05-21 21:11:20,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762223103] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:20,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87140694] [2021-05-21 21:11:20,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:20,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:20,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 10 conjunts are in the unsatisfiable core [2021-05-21 21:11:20,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:20,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-05-21 21:11:20,510 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:20,515 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:20,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:20,518 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:17, output treesize:10 [2021-05-21 21:11:20,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:20,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87140694] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:20,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:20,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-05-21 21:11:20,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253847188] [2021-05-21 21:11:20,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 16 states [2021-05-21 21:11:20,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:20,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-05-21 21:11:20,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-05-21 21:11:20,628 INFO L87 Difference]: Start difference. First operand 152 states and 350 transitions. Second operand has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:20,889 INFO L93 Difference]: Finished difference Result 302 states and 708 transitions. [2021-05-21 21:11:20,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-05-21 21:11:20,889 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-05-21 21:11:20,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:20,893 INFO L225 Difference]: With dead ends: 302 [2021-05-21 21:11:20,893 INFO L226 Difference]: Without dead ends: 218 [2021-05-21 21:11:20,894 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:20,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-05-21 21:11:20,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 185. [2021-05-21 21:11:20,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 2.342391304347826) internal successors, (431), 184 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 431 transitions. [2021-05-21 21:11:20,919 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 431 transitions. Word has length 25 [2021-05-21 21:11:20,920 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:20,920 INFO L482 AbstractCegarLoop]: Abstraction has 185 states and 431 transitions. [2021-05-21 21:11:20,920 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 16 states, 16 states have (on average 2.5625) internal successors, (41), 16 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:20,920 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 431 transitions. [2021-05-21 21:11:20,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-05-21 21:11:20,921 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:20,922 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:21,122 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:21,123 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1527967927, now seen corresponding path program 2 times [2021-05-21 21:11:21,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:21,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714316563] [2021-05-21 21:11:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:21,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:21,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:21,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:21,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714316563] [2021-05-21 21:11:21,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714316563] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:21,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576838887] [2021-05-21 21:11:21,163 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:21,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:21,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:21,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 4 conjunts are in the unsatisfiable core [2021-05-21 21:11:21,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:21,284 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:21,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576838887] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:21,285 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:21,285 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 5 [2021-05-21 21:11:21,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873637092] [2021-05-21 21:11:21,286 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-05-21 21:11:21,286 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:21,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-05-21 21:11:21,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:11:21,287 INFO L87 Difference]: Start difference. First operand 185 states and 431 transitions. Second operand has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:21,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:21,306 INFO L93 Difference]: Finished difference Result 496 states and 1143 transitions. [2021-05-21 21:11:21,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-05-21 21:11:21,307 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-05-21 21:11:21,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:21,309 INFO L225 Difference]: With dead ends: 496 [2021-05-21 21:11:21,309 INFO L226 Difference]: Without dead ends: 454 [2021-05-21 21:11:21,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-05-21 21:11:21,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-05-21 21:11:21,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 336. [2021-05-21 21:11:21,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 336 states, 335 states have (on average 2.4298507462686567) internal successors, (814), 335 states have internal predecessors, (814), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:21,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 336 states to 336 states and 814 transitions. [2021-05-21 21:11:21,325 INFO L78 Accepts]: Start accepts. Automaton has 336 states and 814 transitions. Word has length 28 [2021-05-21 21:11:21,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:21,325 INFO L482 AbstractCegarLoop]: Abstraction has 336 states and 814 transitions. [2021-05-21 21:11:21,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 6.8) internal successors, (34), 5 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:21,326 INFO L276 IsEmpty]: Start isEmpty. Operand 336 states and 814 transitions. [2021-05-21 21:11:21,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:21,328 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:21,328 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:21,544 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:21,545 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:21,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:21,545 INFO L82 PathProgramCache]: Analyzing trace with hash 703493603, now seen corresponding path program 3 times [2021-05-21 21:11:21,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:21,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528524016] [2021-05-21 21:11:21,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:21,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:21,759 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:21,760 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:21,760 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528524016] [2021-05-21 21:11:21,761 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528524016] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:21,761 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961280219] [2021-05-21 21:11:21,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:21,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-05-21 21:11:21,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:11:21,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:22,159 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-21 21:11:22,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-21 21:11:22,164 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:22,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:22,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:22,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-05-21 21:11:22,251 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:22,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [961280219] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:22,251 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:22,251 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-21 21:11:22,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845600468] [2021-05-21 21:11:22,252 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:22,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:22,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:22,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:22,253 INFO L87 Difference]: Start difference. First operand 336 states and 814 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:24,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:24,677 INFO L93 Difference]: Finished difference Result 1720 states and 4262 transitions. [2021-05-21 21:11:24,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-05-21 21:11:24,678 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:11:24,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:24,685 INFO L225 Difference]: With dead ends: 1720 [2021-05-21 21:11:24,685 INFO L226 Difference]: Without dead ends: 1181 [2021-05-21 21:11:24,690 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2149 ImplicationChecksByTransitivity, 2026.0ms TimeCoverageRelationStatistics Valid=1330, Invalid=5642, Unknown=0, NotChecked=0, Total=6972 [2021-05-21 21:11:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1181 states. [2021-05-21 21:11:24,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1181 to 409. [2021-05-21 21:11:24,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 408 states have (on average 2.4534313725490198) internal successors, (1001), 408 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 1001 transitions. [2021-05-21 21:11:24,711 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 1001 transitions. Word has length 31 [2021-05-21 21:11:24,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:24,711 INFO L482 AbstractCegarLoop]: Abstraction has 409 states and 1001 transitions. [2021-05-21 21:11:24,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:24,712 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 1001 transitions. [2021-05-21 21:11:24,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:24,715 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:24,715 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:24,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:24,939 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:24,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:24,939 INFO L82 PathProgramCache]: Analyzing trace with hash -1642327051, now seen corresponding path program 4 times [2021-05-21 21:11:24,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:24,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [559970902] [2021-05-21 21:11:24,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:25,147 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:25,147 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:25,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [559970902] [2021-05-21 21:11:25,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [559970902] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:25,147 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [796866681] [2021-05-21 21:11:25,148 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:25,186 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:25,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:25,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:11:25,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:25,423 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-21 21:11:25,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-21 21:11:25,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:25,431 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:25,433 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:25,433 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-05-21 21:11:25,495 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:25,495 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [796866681] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:25,496 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:25,496 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-21 21:11:25,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595311257] [2021-05-21 21:11:25,496 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:25,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:25,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:25,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=466, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:25,497 INFO L87 Difference]: Start difference. First operand 409 states and 1001 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:27,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:27,233 INFO L93 Difference]: Finished difference Result 1293 states and 3137 transitions. [2021-05-21 21:11:27,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-05-21 21:11:27,233 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:11:27,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:27,238 INFO L225 Difference]: With dead ends: 1293 [2021-05-21 21:11:27,238 INFO L226 Difference]: Without dead ends: 1200 [2021-05-21 21:11:27,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1554.2ms TimeCoverageRelationStatistics Valid=1047, Invalid=4065, Unknown=0, NotChecked=0, Total=5112 [2021-05-21 21:11:27,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1200 states. [2021-05-21 21:11:27,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1200 to 413. [2021-05-21 21:11:27,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 413 states, 412 states have (on average 2.4490291262135924) internal successors, (1009), 412 states have internal predecessors, (1009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:27,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 413 states to 413 states and 1009 transitions. [2021-05-21 21:11:27,255 INFO L78 Accepts]: Start accepts. Automaton has 413 states and 1009 transitions. Word has length 31 [2021-05-21 21:11:27,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:27,255 INFO L482 AbstractCegarLoop]: Abstraction has 413 states and 1009 transitions. [2021-05-21 21:11:27,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:27,255 INFO L276 IsEmpty]: Start isEmpty. Operand 413 states and 1009 transitions. [2021-05-21 21:11:27,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:27,256 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:27,256 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:27,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:27,473 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:27,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:27,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1488152547, now seen corresponding path program 5 times [2021-05-21 21:11:27,474 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:27,474 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391308095] [2021-05-21 21:11:27,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:27,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:27,675 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:27,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:27,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391308095] [2021-05-21 21:11:27,676 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391308095] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:27,676 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1604879113] [2021-05-21 21:11:27,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:27,703 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-05-21 21:11:27,703 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:27,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 20 conjunts are in the unsatisfiable core [2021-05-21 21:11:27,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:27,966 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-21 21:11:27,967 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-21 21:11:27,971 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:27,975 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:27,976 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:27,976 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-05-21 21:11:28,035 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:28,036 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1604879113] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:28,036 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:28,036 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-21 21:11:28,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699715980] [2021-05-21 21:11:28,036 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:28,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:28,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:28,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=465, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:28,038 INFO L87 Difference]: Start difference. First operand 413 states and 1009 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:30,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:30,377 INFO L93 Difference]: Finished difference Result 3428 states and 8347 transitions. [2021-05-21 21:11:30,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-21 21:11:30,377 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:11:30,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:30,389 INFO L225 Difference]: With dead ends: 3428 [2021-05-21 21:11:30,389 INFO L226 Difference]: Without dead ends: 2445 [2021-05-21 21:11:30,391 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2988 ImplicationChecksByTransitivity, 2044.4ms TimeCoverageRelationStatistics Valid=1636, Invalid=7106, Unknown=0, NotChecked=0, Total=8742 [2021-05-21 21:11:30,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2445 states. [2021-05-21 21:11:30,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2445 to 445. [2021-05-21 21:11:30,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 445 states, 444 states have (on average 2.463963963963964) internal successors, (1094), 444 states have internal predecessors, (1094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:30,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 445 states to 445 states and 1094 transitions. [2021-05-21 21:11:30,414 INFO L78 Accepts]: Start accepts. Automaton has 445 states and 1094 transitions. Word has length 31 [2021-05-21 21:11:30,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:30,414 INFO L482 AbstractCegarLoop]: Abstraction has 445 states and 1094 transitions. [2021-05-21 21:11:30,414 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:30,414 INFO L276 IsEmpty]: Start isEmpty. Operand 445 states and 1094 transitions. [2021-05-21 21:11:30,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:30,415 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:30,415 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:30,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-05-21 21:11:30,629 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1925512583, now seen corresponding path program 6 times [2021-05-21 21:11:30,630 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:30,630 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009547365] [2021-05-21 21:11:30,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:30,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:30,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:11:30,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:30,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009547365] [2021-05-21 21:11:30,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009547365] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:30,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403935332] [2021-05-21 21:11:30,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:30,807 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-05-21 21:11:30,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:30,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:11:30,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:31,035 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-21 21:11:31,036 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-21 21:11:31,039 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:31,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:31,044 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:31,044 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-05-21 21:11:31,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:31,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403935332] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:31,099 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:31,099 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-05-21 21:11:31,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1005500019] [2021-05-21 21:11:31,099 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:11:31,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:11:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=425, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:11:31,100 INFO L87 Difference]: Start difference. First operand 445 states and 1094 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:33,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:33,339 INFO L93 Difference]: Finished difference Result 2497 states and 6083 transitions. [2021-05-21 21:11:33,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-05-21 21:11:33,339 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:11:33,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:33,347 INFO L225 Difference]: With dead ends: 2497 [2021-05-21 21:11:33,347 INFO L226 Difference]: Without dead ends: 2112 [2021-05-21 21:11:33,349 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3112 ImplicationChecksByTransitivity, 1897.1ms TimeCoverageRelationStatistics Valid=1578, Invalid=6978, Unknown=0, NotChecked=0, Total=8556 [2021-05-21 21:11:33,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2112 states. [2021-05-21 21:11:33,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2112 to 573. [2021-05-21 21:11:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.4737762237762237) internal successors, (1415), 572 states have internal predecessors, (1415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:33,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1415 transitions. [2021-05-21 21:11:33,374 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1415 transitions. Word has length 31 [2021-05-21 21:11:33,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:33,374 INFO L482 AbstractCegarLoop]: Abstraction has 573 states and 1415 transitions. [2021-05-21 21:11:33,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:33,374 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1415 transitions. [2021-05-21 21:11:33,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:33,376 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:33,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:33,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-05-21 21:11:33,595 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:33,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:33,595 INFO L82 PathProgramCache]: Analyzing trace with hash -879696673, now seen corresponding path program 7 times [2021-05-21 21:11:33,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:33,596 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1685443745] [2021-05-21 21:11:33,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:33,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:33,778 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:33,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:33,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1685443745] [2021-05-21 21:11:33,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1685443745] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:33,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666150983] [2021-05-21 21:11:33,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:33,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:33,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:11:33,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:34,025 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-21 21:11:34,025 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-21 21:11:34,027 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:34,030 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:34,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:34,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-05-21 21:11:34,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:34,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666150983] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:34,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:34,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 24 [2021-05-21 21:11:34,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993954110] [2021-05-21 21:11:34,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 24 states [2021-05-21 21:11:34,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:34,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-05-21 21:11:34,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=462, Unknown=0, NotChecked=0, Total=552 [2021-05-21 21:11:34,090 INFO L87 Difference]: Start difference. First operand 573 states and 1415 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:35,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:35,794 INFO L93 Difference]: Finished difference Result 2289 states and 5693 transitions. [2021-05-21 21:11:35,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-05-21 21:11:35,795 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:11:35,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:35,800 INFO L225 Difference]: With dead ends: 2289 [2021-05-21 21:11:35,800 INFO L226 Difference]: Without dead ends: 1584 [2021-05-21 21:11:35,802 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1761 ImplicationChecksByTransitivity, 1486.7ms TimeCoverageRelationStatistics Valid=1152, Invalid=4854, Unknown=0, NotChecked=0, Total=6006 [2021-05-21 21:11:35,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1584 states. [2021-05-21 21:11:35,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1584 to 605. [2021-05-21 21:11:35,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 605 states, 604 states have (on average 2.468543046357616) internal successors, (1491), 604 states have internal predecessors, (1491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:35,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 605 states to 605 states and 1491 transitions. [2021-05-21 21:11:35,819 INFO L78 Accepts]: Start accepts. Automaton has 605 states and 1491 transitions. Word has length 31 [2021-05-21 21:11:35,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:35,819 INFO L482 AbstractCegarLoop]: Abstraction has 605 states and 1491 transitions. [2021-05-21 21:11:35,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:35,819 INFO L276 IsEmpty]: Start isEmpty. Operand 605 states and 1491 transitions. [2021-05-21 21:11:35,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-05-21 21:11:35,821 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:35,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:36,036 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:36,037 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:36,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:36,037 INFO L82 PathProgramCache]: Analyzing trace with hash 320665773, now seen corresponding path program 8 times [2021-05-21 21:11:36,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:36,037 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575080073] [2021-05-21 21:11:36,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:36,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:36,213 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:11:36,214 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:36,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575080073] [2021-05-21 21:11:36,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575080073] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:36,214 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428917822] [2021-05-21 21:11:36,214 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:36,256 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:11:36,257 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:36,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 18 conjunts are in the unsatisfiable core [2021-05-21 21:11:36,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:36,473 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-05-21 21:11:36,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 25 treesize of output 13 [2021-05-21 21:11:36,475 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:36,480 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:36,480 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:36,481 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:28, output treesize:10 [2021-05-21 21:11:36,544 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:36,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428917822] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:36,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:36,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-05-21 21:11:36,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190449256] [2021-05-21 21:11:36,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 23 states [2021-05-21 21:11:36,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:36,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-05-21 21:11:36,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2021-05-21 21:11:36,546 INFO L87 Difference]: Start difference. First operand 605 states and 1491 transitions. Second operand has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:38,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:38,091 INFO L93 Difference]: Finished difference Result 2332 states and 5648 transitions. [2021-05-21 21:11:38,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-05-21 21:11:38,091 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-05-21 21:11:38,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:38,098 INFO L225 Difference]: With dead ends: 2332 [2021-05-21 21:11:38,098 INFO L226 Difference]: Without dead ends: 1883 [2021-05-21 21:11:38,100 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 1328.9ms TimeCoverageRelationStatistics Valid=1008, Invalid=4248, Unknown=0, NotChecked=0, Total=5256 [2021-05-21 21:11:38,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1883 states. [2021-05-21 21:11:38,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1883 to 643. [2021-05-21 21:11:38,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 643 states, 642 states have (on average 2.454828660436137) internal successors, (1576), 642 states have internal predecessors, (1576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:38,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 643 states to 643 states and 1576 transitions. [2021-05-21 21:11:38,117 INFO L78 Accepts]: Start accepts. Automaton has 643 states and 1576 transitions. Word has length 31 [2021-05-21 21:11:38,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:38,117 INFO L482 AbstractCegarLoop]: Abstraction has 643 states and 1576 transitions. [2021-05-21 21:11:38,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 23 states, 23 states have (on average 2.3043478260869565) internal successors, (53), 23 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:38,118 INFO L276 IsEmpty]: Start isEmpty. Operand 643 states and 1576 transitions. [2021-05-21 21:11:38,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-05-21 21:11:38,119 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:38,119 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:38,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-05-21 21:11:38,341 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:38,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:38,342 INFO L82 PathProgramCache]: Analyzing trace with hash 2067503680, now seen corresponding path program 9 times [2021-05-21 21:11:38,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:38,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [430591362] [2021-05-21 21:11:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:38,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:38,383 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:38,383 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:38,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [430591362] [2021-05-21 21:11:38,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [430591362] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:38,383 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200201405] [2021-05-21 21:11:38,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:38,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:11:38,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:38,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 6 conjunts are in the unsatisfiable core [2021-05-21 21:11:38,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:38,473 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:38,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200201405] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:38,473 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:38,473 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 6 [2021-05-21 21:11:38,473 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593011432] [2021-05-21 21:11:38,473 INFO L462 AbstractCegarLoop]: Interpolant automaton has 6 states [2021-05-21 21:11:38,473 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:38,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-05-21 21:11:38,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:11:38,474 INFO L87 Difference]: Start difference. First operand 643 states and 1576 transitions. Second operand has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:38,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:38,487 INFO L93 Difference]: Finished difference Result 1162 states and 2791 transitions. [2021-05-21 21:11:38,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-05-21 21:11:38,488 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-05-21 21:11:38,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:38,492 INFO L225 Difference]: With dead ends: 1162 [2021-05-21 21:11:38,492 INFO L226 Difference]: Without dead ends: 1105 [2021-05-21 21:11:38,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 12.6ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-05-21 21:11:38,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1105 states. [2021-05-21 21:11:38,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1105 to 768. [2021-05-21 21:11:38,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 768 states, 767 states have (on average 2.4771838331160363) internal successors, (1900), 767 states have internal predecessors, (1900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 768 states to 768 states and 1900 transitions. [2021-05-21 21:11:38,508 INFO L78 Accepts]: Start accepts. Automaton has 768 states and 1900 transitions. Word has length 34 [2021-05-21 21:11:38,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:38,508 INFO L482 AbstractCegarLoop]: Abstraction has 768 states and 1900 transitions. [2021-05-21 21:11:38,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 6 states, 6 states have (on average 6.666666666666667) internal successors, (40), 6 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:38,509 INFO L276 IsEmpty]: Start isEmpty. Operand 768 states and 1900 transitions. [2021-05-21 21:11:38,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:11:38,510 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:38,510 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:38,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-05-21 21:11:38,729 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:38,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:38,729 INFO L82 PathProgramCache]: Analyzing trace with hash 774999660, now seen corresponding path program 10 times [2021-05-21 21:11:38,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:38,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366177309] [2021-05-21 21:11:38,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:38,932 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:38,932 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:38,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366177309] [2021-05-21 21:11:38,932 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366177309] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:38,932 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198141853] [2021-05-21 21:11:38,933 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:38,962 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-05-21 21:11:38,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:38,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:11:38,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:39,313 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-05-21 21:11:39,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-05-21 21:11:39,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:39,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:39,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:39,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-05-21 21:11:39,383 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:39,383 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198141853] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:39,383 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:39,383 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-05-21 21:11:39,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608084628] [2021-05-21 21:11:39,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:11:39,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:39,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:11:39,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=869, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:11:39,385 INFO L87 Difference]: Start difference. First operand 768 states and 1900 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:43,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:43,578 INFO L93 Difference]: Finished difference Result 4022 states and 9925 transitions. [2021-05-21 21:11:43,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-05-21 21:11:43,578 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:11:43,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:43,588 INFO L225 Difference]: With dead ends: 4022 [2021-05-21 21:11:43,588 INFO L226 Difference]: Without dead ends: 3406 [2021-05-21 21:11:43,591 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 132 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5970 ImplicationChecksByTransitivity, 3417.8ms TimeCoverageRelationStatistics Valid=2702, Invalid=15120, Unknown=0, NotChecked=0, Total=17822 [2021-05-21 21:11:43,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3406 states. [2021-05-21 21:11:43,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3406 to 917. [2021-05-21 21:11:43,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 917 states, 916 states have (on average 2.5010917030567685) internal successors, (2291), 916 states have internal predecessors, (2291), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:43,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 917 states to 917 states and 2291 transitions. [2021-05-21 21:11:43,623 INFO L78 Accepts]: Start accepts. Automaton has 917 states and 2291 transitions. Word has length 37 [2021-05-21 21:11:43,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:43,623 INFO L482 AbstractCegarLoop]: Abstraction has 917 states and 2291 transitions. [2021-05-21 21:11:43,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:43,623 INFO L276 IsEmpty]: Start isEmpty. Operand 917 states and 2291 transitions. [2021-05-21 21:11:43,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:11:43,625 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:43,625 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:43,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-05-21 21:11:43,841 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:43,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:43,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1677954198, now seen corresponding path program 11 times [2021-05-21 21:11:43,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:43,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347969736] [2021-05-21 21:11:43,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:44,083 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:44,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:44,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347969736] [2021-05-21 21:11:44,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347969736] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:44,084 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [218744464] [2021-05-21 21:11:44,084 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:44,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-05-21 21:11:44,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:44,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:11:44,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:44,602 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:11:44,603 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:44,604 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:44,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:44,607 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:44,608 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:44,609 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:44,609 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:11:44,610 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:11:44,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 38 treesize of output 18 [2021-05-21 21:11:44,614 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:44,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:44,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 2 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:44,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 3 variables, input treesize:49, output treesize:10 [2021-05-21 21:11:44,702 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:44,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [218744464] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:44,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:44,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-05-21 21:11:44,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877324253] [2021-05-21 21:11:44,703 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:11:44,703 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:44,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:11:44,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=873, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:11:44,704 INFO L87 Difference]: Start difference. First operand 917 states and 2291 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:49,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:49,998 INFO L93 Difference]: Finished difference Result 6772 states and 16848 transitions. [2021-05-21 21:11:49,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-05-21 21:11:49,998 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:11:49,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:50,014 INFO L225 Difference]: With dead ends: 6772 [2021-05-21 21:11:50,014 INFO L226 Difference]: Without dead ends: 5574 [2021-05-21 21:11:50,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 169 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 145 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7549 ImplicationChecksByTransitivity, 4451.0ms TimeCoverageRelationStatistics Valid=3398, Invalid=18064, Unknown=0, NotChecked=0, Total=21462 [2021-05-21 21:11:50,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5574 states. [2021-05-21 21:11:50,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5574 to 1099. [2021-05-21 21:11:50,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1099 states, 1098 states have (on average 2.517304189435337) internal successors, (2764), 1098 states have internal predecessors, (2764), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:50,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1099 states to 1099 states and 2764 transitions. [2021-05-21 21:11:50,055 INFO L78 Accepts]: Start accepts. Automaton has 1099 states and 2764 transitions. Word has length 37 [2021-05-21 21:11:50,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:50,055 INFO L482 AbstractCegarLoop]: Abstraction has 1099 states and 2764 transitions. [2021-05-21 21:11:50,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:50,055 INFO L276 IsEmpty]: Start isEmpty. Operand 1099 states and 2764 transitions. [2021-05-21 21:11:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:11:50,057 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:50,057 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:50,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:50,273 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:50,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:50,273 INFO L82 PathProgramCache]: Analyzing trace with hash 1793916204, now seen corresponding path program 12 times [2021-05-21 21:11:50,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:50,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1759071369] [2021-05-21 21:11:50,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:50,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:50,542 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:50,543 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:50,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1759071369] [2021-05-21 21:11:50,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1759071369] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:50,543 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193962963] [2021-05-21 21:11:50,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:50,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-05-21 21:11:50,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:11:50,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 24 conjunts are in the unsatisfiable core [2021-05-21 21:11:50,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:51,223 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:51,224 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:11:51,225 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:51,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-05-21 21:11:51,226 INFO L173 IndexEqualityManager]: detected equality via solver [2021-05-21 21:11:51,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 18 [2021-05-21 21:11:51,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:51,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:51,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 5 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:51,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 6 variables, input treesize:58, output treesize:10 [2021-05-21 21:11:51,326 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:51,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193962963] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:51,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:51,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 32 [2021-05-21 21:11:51,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074027598] [2021-05-21 21:11:51,328 INFO L462 AbstractCegarLoop]: Interpolant automaton has 32 states [2021-05-21 21:11:51,328 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:51,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-05-21 21:11:51,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=875, Unknown=0, NotChecked=0, Total=992 [2021-05-21 21:11:51,329 INFO L87 Difference]: Start difference. First operand 1099 states and 2764 transitions. Second operand has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:56,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:11:56,575 INFO L93 Difference]: Finished difference Result 5656 states and 14216 transitions. [2021-05-21 21:11:56,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-05-21 21:11:56,575 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:11:56,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:11:56,585 INFO L225 Difference]: With dead ends: 5656 [2021-05-21 21:11:56,585 INFO L226 Difference]: Without dead ends: 5239 [2021-05-21 21:11:56,587 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6607 ImplicationChecksByTransitivity, 4344.6ms TimeCoverageRelationStatistics Valid=2865, Invalid=16595, Unknown=0, NotChecked=0, Total=19460 [2021-05-21 21:11:56,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5239 states. [2021-05-21 21:11:56,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5239 to 1221. [2021-05-21 21:11:56,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1221 states, 1220 states have (on average 2.533606557377049) internal successors, (3091), 1220 states have internal predecessors, (3091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:56,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1221 states to 1221 states and 3091 transitions. [2021-05-21 21:11:56,632 INFO L78 Accepts]: Start accepts. Automaton has 1221 states and 3091 transitions. Word has length 37 [2021-05-21 21:11:56,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:11:56,632 INFO L482 AbstractCegarLoop]: Abstraction has 1221 states and 3091 transitions. [2021-05-21 21:11:56,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 32 states, 32 states have (on average 2.21875) internal successors, (71), 32 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:11:56,633 INFO L276 IsEmpty]: Start isEmpty. Operand 1221 states and 3091 transitions. [2021-05-21 21:11:56,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:11:56,635 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:11:56,635 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:11:56,848 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:56,849 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:11:56,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:11:56,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1799631944, now seen corresponding path program 13 times [2021-05-21 21:11:56,849 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:11:56,849 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1494521142] [2021-05-21 21:11:56,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:11:56,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:57,044 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:11:57,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:11:57,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1494521142] [2021-05-21 21:11:57,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1494521142] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:57,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332522998] [2021-05-21 21:11:57,045 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:11:57,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:11:57,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:11:57,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:11:57,448 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-05-21 21:11:57,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-05-21 21:11:57,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:11:57,456 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:11:57,456 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:11:57,456 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-05-21 21:11:57,532 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:11:57,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332522998] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:11:57,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:11:57,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-05-21 21:11:57,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1716571942] [2021-05-21 21:11:57,533 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:11:57,533 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:11:57,533 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:11:57,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=813, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:11:57,533 INFO L87 Difference]: Start difference. First operand 1221 states and 3091 transitions. Second operand has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:02,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:02,433 INFO L93 Difference]: Finished difference Result 7387 states and 18497 transitions. [2021-05-21 21:12:02,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-05-21 21:12:02,433 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:12:02,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:02,445 INFO L225 Difference]: With dead ends: 7387 [2021-05-21 21:12:02,445 INFO L226 Difference]: Without dead ends: 6259 [2021-05-21 21:12:02,446 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 148 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8391 ImplicationChecksByTransitivity, 4126.8ms TimeCoverageRelationStatistics Valid=3701, Invalid=18649, Unknown=0, NotChecked=0, Total=22350 [2021-05-21 21:12:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6259 states. [2021-05-21 21:12:02,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6259 to 1453. [2021-05-21 21:12:02,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1453 states, 1452 states have (on average 2.548898071625344) internal successors, (3701), 1452 states have internal predecessors, (3701), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:02,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1453 states to 1453 states and 3701 transitions. [2021-05-21 21:12:02,499 INFO L78 Accepts]: Start accepts. Automaton has 1453 states and 3701 transitions. Word has length 37 [2021-05-21 21:12:02,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:02,499 INFO L482 AbstractCegarLoop]: Abstraction has 1453 states and 3701 transitions. [2021-05-21 21:12:02,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.096774193548387) internal successors, (65), 31 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:02,499 INFO L276 IsEmpty]: Start isEmpty. Operand 1453 states and 3701 transitions. [2021-05-21 21:12:02,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:12:02,501 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:02,502 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:02,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-05-21 21:12:02,715 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:02,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:02,715 INFO L82 PathProgramCache]: Analyzing trace with hash -1710676408, now seen corresponding path program 14 times [2021-05-21 21:12:02,715 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:02,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161152922] [2021-05-21 21:12:02,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:02,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:02,963 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:02,963 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:02,963 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161152922] [2021-05-21 21:12:02,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161152922] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:02,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527911243] [2021-05-21 21:12:02,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:02,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-05-21 21:12:02,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:02,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 26 conjunts are in the unsatisfiable core [2021-05-21 21:12:02,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:03,345 INFO L354 Elim1Store]: treesize reduction 32, result has 3.0 percent of original size [2021-05-21 21:12:03,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 38 treesize of output 18 [2021-05-21 21:12:03,348 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-05-21 21:12:03,353 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-05-21 21:12:03,354 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-05-21 21:12:03,354 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:41, output treesize:10 [2021-05-21 21:12:03,429 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-05-21 21:12:03,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527911243] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:03,430 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-05-21 21:12:03,430 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 31 [2021-05-21 21:12:03,430 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20448260] [2021-05-21 21:12:03,430 INFO L462 AbstractCegarLoop]: Interpolant automaton has 31 states [2021-05-21 21:12:03,431 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-05-21 21:12:03,431 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-05-21 21:12:03,431 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=811, Unknown=0, NotChecked=0, Total=930 [2021-05-21 21:12:03,431 INFO L87 Difference]: Start difference. First operand 1453 states and 3701 transitions. Second operand has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:08,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-05-21 21:12:08,452 INFO L93 Difference]: Finished difference Result 9364 states and 23545 transitions. [2021-05-21 21:12:08,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2021-05-21 21:12:08,453 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-05-21 21:12:08,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-05-21 21:12:08,469 INFO L225 Difference]: With dead ends: 9364 [2021-05-21 21:12:08,469 INFO L226 Difference]: Without dead ends: 8006 [2021-05-21 21:12:08,472 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10091 ImplicationChecksByTransitivity, 4187.3ms TimeCoverageRelationStatistics Valid=3731, Invalid=21709, Unknown=0, NotChecked=0, Total=25440 [2021-05-21 21:12:08,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8006 states. [2021-05-21 21:12:08,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8006 to 2053. [2021-05-21 21:12:08,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2053 states, 2052 states have (on average 2.574561403508772) internal successors, (5283), 2052 states have internal predecessors, (5283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:08,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2053 states to 2053 states and 5283 transitions. [2021-05-21 21:12:08,562 INFO L78 Accepts]: Start accepts. Automaton has 2053 states and 5283 transitions. Word has length 37 [2021-05-21 21:12:08,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-05-21 21:12:08,562 INFO L482 AbstractCegarLoop]: Abstraction has 2053 states and 5283 transitions. [2021-05-21 21:12:08,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 31 states, 31 states have (on average 2.2903225806451615) internal successors, (71), 31 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-05-21 21:12:08,562 INFO L276 IsEmpty]: Start isEmpty. Operand 2053 states and 5283 transitions. [2021-05-21 21:12:08,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-05-21 21:12:08,566 INFO L513 BasicCegarLoop]: Found error trace [2021-05-21 21:12:08,566 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-05-21 21:12:08,789 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:08,789 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-05-21 21:12:08,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-05-21 21:12:08,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1273316372, now seen corresponding path program 15 times [2021-05-21 21:12:08,790 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-05-21 21:12:08,790 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049008913] [2021-05-21 21:12:08,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-05-21 21:12:08,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-05-21 21:12:08,981 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 23 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-05-21 21:12:08,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-05-21 21:12:08,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049008913] [2021-05-21 21:12:08,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049008913] provided 0 perfect and 1 imperfect interpolant sequences [2021-05-21 21:12:08,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672999774] [2021-05-21 21:12:08,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:09,013 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-05-21 21:12:09,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-05-21 21:12:09,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 33 conjunts are in the unsatisfiable core [2021-05-21 21:12:09,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-05-21 21:12:09,308 WARN L348 FreeRefinementEngine]: Global settings require throwing the following exception [2021-05-21 21:12:09,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-05-21 21:12:09,531 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.NullPointerException at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.derSimple(XnfDer.java:308) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate_EqInfoBased(XnfDer.java:138) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.XnfDer.tryToEliminate(XnfDer.java:101) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.elim(PartialQuantifierElimination.java:255) at de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.PartialQuantifierElimination.tryToEliminate(PartialQuantifierElimination.java:100) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer$QuantifierEliminationPostprocessor.postprocess(IterativePredicateTransformer.java:246) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.applyPostprocessors(IterativePredicateTransformer.java:440) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.predicates.IterativePredicateTransformer.computeStrongestPostconditionSequence(IterativePredicateTransformer.java:201) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolantsUsingUnsatCore(TraceCheckSpWp.java:299) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.computeInterpolants(TraceCheckSpWp.java:185) at de.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.singletracecheck.TraceCheckSpWp.(TraceCheckSpWp.java:163) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:108) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSpWp.construct(IpTcStrategyModuleSpWp.java:1) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:100) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:76) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.tryExecuteInterpolantGenerator(AutomatonFreeRefinementEngine.java:297) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.generateProof(AutomatonFreeRefinementEngine.java:190) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.executeStrategy(AutomatonFreeRefinementEngine.java:180) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.AutomatonFreeRefinementEngine.(AutomatonFreeRefinementEngine.java:84) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:74) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:610) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:439) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:374) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:69) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.CegarLoopUtils.getCegarLoopResult(CegarLoopUtils.java:63) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.executeCegarLoop(TraceAbstractionStarter.java:371) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseProgram(TraceAbstractionStarter.java:307) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.analyseConcurrentProgram(TraceAbstractionStarter.java:236) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:154) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:124) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:320) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:63) [2021-05-21 21:12:09,534 INFO L168 Benchmark]: Toolchain (without parser) took 50591.35 ms. Allocated memory was 341.8 MB in the beginning and 549.5 MB in the end (delta: 207.6 MB). Free memory was 321.1 MB in the beginning and 486.3 MB in the end (delta: -165.2 MB). Peak memory consumption was 44.5 MB. Max. memory is 16.0 GB. [2021-05-21 21:12:09,534 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory was 322.3 MB in the beginning and 322.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:12:09,534 INFO L168 Benchmark]: Boogie Procedure Inliner took 24.64 ms. Allocated memory is still 341.8 MB. Free memory was 321.1 MB in the beginning and 319.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-05-21 21:12:09,534 INFO L168 Benchmark]: Boogie Preprocessor took 15.52 ms. Allocated memory is still 341.8 MB. Free memory was 319.6 MB in the beginning and 318.6 MB in the end (delta: 954.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-05-21 21:12:09,534 INFO L168 Benchmark]: RCFGBuilder took 311.53 ms. Allocated memory is still 341.8 MB. Free memory was 318.5 MB in the beginning and 305.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. [2021-05-21 21:12:09,534 INFO L168 Benchmark]: TraceAbstraction took 50222.24 ms. Allocated memory was 341.8 MB in the beginning and 549.5 MB in the end (delta: 207.6 MB). Free memory was 305.5 MB in the beginning and 486.3 MB in the end (delta: -180.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 16.0 GB. [2021-05-21 21:12:09,535 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.12 ms. Allocated memory is still 341.8 MB. Free memory was 322.3 MB in the beginning and 322.2 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 24.64 ms. Allocated memory is still 341.8 MB. Free memory was 321.1 MB in the beginning and 319.6 MB in the end (delta: 1.4 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 15.52 ms. Allocated memory is still 341.8 MB. Free memory was 319.6 MB in the beginning and 318.6 MB in the end (delta: 954.8 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 311.53 ms. Allocated memory is still 341.8 MB. Free memory was 318.5 MB in the beginning and 305.9 MB in the end (delta: 12.6 MB). Peak memory consumption was 12.6 MB. Max. memory is 16.0 GB. * TraceAbstraction took 50222.24 ms. Allocated memory was 341.8 MB in the beginning and 549.5 MB in the end (delta: 207.6 MB). Free memory was 305.5 MB in the beginning and 486.3 MB in the end (delta: -180.8 MB). Peak memory consumption was 27.8 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: NullPointerException: null de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: NullPointerException: null: de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.EqualityInformation.getEqinfo(EqualityInformation.java:130) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...